Data Processing Method, Terminal, and Base Station

1. A data processing method implemented by a terminal, comprising: determining whether a power variation or a path loss variation on a sounding reference signal only component carrier (SRS-only CC) exceeds a first preset value; generating a power headroom report (PHR) for the SRS-only CC in response to determining that the power variation or the path loss variation on the SRS-only CC exceeds the first preset value, wherein the PHR for the SRS-only CC describes an uplink transmit power of the terminal on the SRS-only CC, wherein the PHR comprises a field Ci indicating a cell index of the SRS-only CC, wherein the field Ci is set to one when the terminal reports the PHR for the SRS-only CC, and wherein the field Ci is set to zero when the terminal does not report the PHR for the SRS-only CC; and sending the PHR to a base station.

2. The method of claim 1 , wherein the PHR further comprises a field R, a field V, a field PH, a field P, and a field PCMAX,c, wherein the field R is a reserved bit and is set to 0, wherein the field V indicates that a power headroom value is calculated based on a format for actual sending or a reference format, wherein the field PH indicates the power headroom value, wherein the field P indicates whether power backoff is applied to Medium Access Control (MAC), and wherein the field PCMAX,c indicates a maximum transmit power of the terminal in a cell c that is used to calculate the power headroom value.

3. The method of claim 2 , wherein the generating the PHR for the SRS-only CC comprises: generating the field Ci, the field R, the field V, the field PH, the field P, and the field PCMAX,c; when the terminal reports the PHR for the SRS-only CC, setting the field Ci to one; when the terminal does not report the PHR for the SRS-only CC, setting the field Ci to zero; when the terminal determines that an SRS is sent on the SRS-only CC, setting the field V to zero; and when the terminal determines that no SRS is sent on the SRS-only CC, setting the field V to one.

4. The method of claim 2 , wherein the generating the PHR for the SRS-only CC comprises: generating the field Ci, the field V, the field PH, the field P, the field PCMAX,c, a field I, and a field S; when the PHR is a report for the SRS-only CC: setting the field I to one; and setting the field V to zero; when the terminal determines that an SRS is sent on the SRS-only CC, setting the field S to zero; and when the terminal determines that no SRS is sent on the SRS-only CC, setting the field S to one.

5. The method of claim 2 , wherein the PHR further comprises a first PHR for a primary serving cell (PCell) and a second PHR for a secondary serving cell (SCell).

6. The method of claim 2 , wherein generating the PHR for the SRS-only CC comprises: generating the field Ci, the field R, the field V, the field PH, the field P, and the field PCMAX,c; and when the terminal reports the PHR for the SRS-only CC, setting the field Ci to one.

7. The method of claim 2 , wherein generating the PHR for the SRS-only CC comprises: generating the field Ci, the field R, the field V, the field PH, the field P, and the field PCMAX,c; and when the terminal determines that an SRS is sent on the SRS-only CC, setting the field V to zero.

8. The method of claim 2 , wherein generating the PHR for the SRS-only CC comprises: generating the field Ci, the field R, the field V, the field PH, the field P, and the field PCMAX,c; and when the terminal determines that no SRS is sent on the SRS-only CC, setting the field V to one.

9. The method of claim 2 , wherein generating the PHR for the SRS-only CC comprises: generating the field Ci, the field R, the field V, the field PH, the field P, and the field PCMAX,c; when the terminal determines that an SRS is sent on the SRS-only CC, setting the field V to zero; and when the terminal determines that no SRS is sent on the SRS-only CC, setting the field V to one.

10. The method of claim 1 , further comprising generating the power headroom report (PHR) for the SRS-only CC in response to determining that the power variation or the path loss variation on the SRS-only CC exceeds a second preset value.

11. A terminal, comprising: at least one processor; and a memory coupled to the at least one processor and storing programming instructions that, when executed by the at least one processor, cause the terminal to: determine whether a power variation or a path loss variation on a sounding reference signal only component carrier (SRS-only CC) exceeds a first preset value; generate a power headroom report (PHR) for the SRS-only CC in response to the power variation or the path loss variation on the SRS-only CC exceeding the first preset value, wherein the PHR for the SRS-only CC describes an uplink transmit power of the terminal on the SRS-only CC, wherein the PHR comprises a field Ci indicating a cell index of the SRS-only CC, wherein the field Ci is set to one when the terminal reports the PHR for the SRS-only CC, and wherein the field Ci is set to zero when the terminal does not report the PHR for the SRS-only CC; and send the PHR to a base station.

12. The terminal of claim 11 , wherein the PHR comprises a field R, a field V, a field PH, a field P, and a field PCMAX,c, wherein the field R is a reserved bit and is set to zero, wherein the field V indicates that a power headroom value is calculated based on a format for actual sending or a reference format, wherein the field PH indicates the power headroom value, wherein the field P indicates whether power backoff is applied to Medium Access Control (MAC), and wherein the field PCMAX,c indicates maximum transmit power of the terminal in a cell c that is used to calculate the power headroom value.

13. The terminal of claim 12 , wherein the programming instructions, when executed by the processor, cause the terminal to generate the PHR for the SRS-only CC by causing the terminal to: generate the field Ci, the field R, the field V, the field PH, the field P, and the field PCMAX,c; when the terminal reports the PHR for the SRS-only CC, set the field Ci to one; when the terminal does not report the PHR for the SRS-only CC, set the field Ci to zero; when the terminal determines that an actual SRS is sent on the SRS-only CC, set the field V to zero; and when the terminal determines that no SRS is sent on the SRS-only CC, set the field V to one.

14. The terminal of claim 12 , wherein the programming instructions, when executed by the processor, cause the terminal to generate the PHR for the SRS-only CC by causing the terminal to: generate the field Ci, the field V, the field PH, the field P, the field PCMAX,c, a field I, and a field S; when the PHR is a report for the SRS-only CC: set the field I to one; and set the field V to zero; when the terminal determines that an SRS is sent on the SRS-only CC, set the field S to zero; and when the terminal determines that no SRS is sent on the SRS-only CC, set the field S to one.

15. The terminal of claim 12 , wherein the PHR further comprises a first PHR for a primary serving cell (PCell) and a second PHR for a secondary serving cell (SCell).

16. The terminal of claim 11 , wherein the programming instructions, when executed by the processor, cause the terminal to generate the power headroom report (PHR) for the SRS-only CC in response to the power variation or the path loss variation on the SRS-only CC exceeding a second preset value.

17. A base station, comprising: at least one processor; and a memory coupled to the at least one processor and storing programming instructions that, when executed by the at least one processor, cause the base station to: send an indication message to a terminal, wherein the indication message instructs the terminal to trigger a power headroom report (PHR) for a sounding reference signal only component carrier (SRS-only CC), wherein the PHR for the SRS-only CC describes an uplink transmit power of the terminal on the SRS-only CC, wherein the PHR comprises a field Ci indicating a cell index of the SRS-only CC, wherein the field Ci is set to one when the terminal reports the PHR for the SRS-only CC, and wherein the field Ci is set to zero when the terminal does not report the PHR for the SRS-only CC; and receive the PHR in response to the indication message, wherein the PHR is generated after sending the indication message.

18. The base station of claim 17 , wherein the programming instructions, when executed by the at least one processor, cause the base station to send the indication message to the terminal by causing the base station to send a Medium Access Control (MAC) control element (MAC CE) to the terminal.

19. The base station of claim 17 , wherein the programming instructions, when executed by the at least one processor, cause the base station to send the indication message to the terminal by causing the base station to send a radio network temporary identifier (RNTI) to the terminal to cause the terminal to trigger the PHR for the SRS-only CC when downlink control signaling for addressing the RNTI is detected.

20. The base station of claim 17 , wherein the programming instructions, when executed by the at least one processor, cause the base station to send the indication message to the terminal by causing the base station to add a target bit to downlink control information, and wherein the target bit instructs the terminal to trigger the PHR for the SRS-only CC.